t = 1:0.001:10000;
%syms x y t
y0dian = 10;
n = 1.1569e-3;
x = 2*y0dian/n - 2*y0dian/n*cos(n*t);
y = -3*y0dian*t+4*y0dian/n*sin(n*t);
plot(-y,x);
figure
y0d = -10;
n = 1.1569e-3;
x = 2*y0d/n - 2*y0d/n*cos(n*t);
y = -3*y0d*t+4*y0d/n*sin(n*t);
plot(-y,x);